Search for standard-model Z and Higgs bosons decaying into a bottom-antibottom quark pair in proton-antiproton collisions at 1.96 TeV

0519457 - FZÚ 2020 RIV US eng J - Journal Article
Aaltonen, T. - Amerio, S. - Amidei, D. - Lysák, Roman … Total 398 authors
Search for standard-model Z and Higgs bosons decaying into a bottom-antibottom quark pair in proton-antiproton collisions at 1.96 TeV.
Physical Review D. Roč. 98, č. 7 (2018), s. 1-9, č. článku 072002. ISSN 2470-0010. E-ISSN 2470-0029
Institutional support: RVO:68378271
Keywords : Batavia TEVATRON Coll * CDF * statistical analysis * data analysis method * experimental results * anti-p p --> Higgs particle anything
OECD category: Particles and field physics
Impact factor: 4.368, year: 2018
Method of publishing: Open access

The Collider Detector at Fermilab collected a unique sample of jets originating from bottom-quark fragmentation (b-jets) by selecting online proton-antiproton (pp¯) collisions with a vertex displaced from the pp¯ interaction point, consistent with the decay of a bottom-quark hadron. This data set, collected at a center-of-mass energy of 1.96 TeV, and corresponding to an integrated luminosity of 5.4  fb-1, is used to measure the Z-boson production cross section times branching ratio into bb¯. The number of Z→bb¯ events is determined by fitting the dijet-mass distribution, while constraining the dominant b-jet background, originating from QCD multijet events, with data. The result, σ(pp¯→Z)×B(Z→bb¯)=1.11±0.08(stat)±0.14(syst)  nb, is the most precise measurement of this process, and is consistent with the standard-model prediction.
Permanent Link: http://hdl.handle.net/11104/0304435